Electrode device for organic device and electronic device having the same

Abstract

To provide an electrode for an organic device which can be widely applied to organic devices by having both hole injection function and electron injection function. A carrier injection electrode layer 110 in which a metal for electron injection 112 (a metal having a work function of 4.2 eV or less) and a metal for hole injection 113 (a metal having a work function of more than 4.2 eV) are mixed with one kind of organic compound 111 is provided between a first organic layer 100 a and a second organic layer 100 b. Thus, carriers are injected into a carrier injection electrode layer 110 in the direction according to voltage application, and seemingly, current flows between an organic layer 100 and a metal electrode 101, or between the first organic layer 100 a and the second organic layer 100 b.

1 . An organic device comprising:
 a first electrode;   a second electrode opposed to the first electrode;   a third electrode between the first electrode and the second electrode;   a first light emitting layer between the first electrode and the third electrode;   a second light emitting layer between the second electrode and the third electrode;   wherein the third electrode is a single layer, wherein the third electrode comprises a metal having a work function of 4.2 eV or less, a metal having a work function of more than 4.2 eV, and an organic compound, and   wherein the organic device is configured to be capable of flowing current from the first electrode to the second electrode.   
     
     
         2 . The organic device according to  claim 1 ,
 wherein the third electrode is in contact with the first light emitting layer.   
     
     
         3 . The organic device according to  claim 1 ,
 wherein the third electrode is in contact with the second light emitting layer.   
     
     
         4 . The organic device according to  claim 1 ,
 wherein the organic compound comprises a π conjugated organic compound.   
     
     
         5 . The organic device according to  claim 1 ,
 wherein the organic compound comprises a bipolar organic compound.   
     
     
         6 . The organic device according to  claim 1 ,
 wherein the third electrode is configured to inject electron to the first light emitting layer and to inject hole to the second light emitting layer when a voltage is applied to the first electrode to the second electrode so that a potential of the first electrode is higher than a potential of the second electrode.   
     
     
         7 . An electronic device comprising the organic device according to  claim 1 , wherein the electronic device is one selected from the group consisting of a cellular phone, a personal computer, a monitor, a video camera, a digital camera, a goggle type display, a navigation system, audio components, a car audio system, game machine, a mobile computer, a portable game machine, an electronic book, and an image reproducing device equipped with a recording medium. 
     
     
         8 . An organic device comprising:
 a first electrode;   a second electrode opposed to the first electrode;   a third electrode between the first electrode and the second electrode;   a first light emitting layer between the first electrode and the third electrode;   a second light emitting layer between the second electrode and the third electrode;   wherein a metal having a work function of 4.2 eV or less, a metal having a work function of more than 4.2 eV, and an organic compound are mixed in the third electrode, and   wherein the organic device is configured to be capable of flowing current from the first electrode to the second electrode.   
     
     
         9 . The organic device according to  claim 8 ,
 wherein the third electrode is in contact with the first light emitting layer.   
     
     
         10 . The organic device according to  claim 8 ,
 wherein the third electrode is in contact with the second light emitting layer.   
     
     
         11 . The organic device according to  claim 8 ,
 wherein the organic compound comprises a π conjugated organic compound.   
     
     
         12 . The organic device according to  claim 8 ,
 wherein the organic compound comprises a bipolar organic compound.   
     
     
         13 . The organic device according to  claim 8 ,
 wherein the third electrode is configured to inject electron to the first light emitting layer and to inject hole to the second light emitting layer when a voltage is applied to the first electrode to the second electrode so that a potential of the first electrode is higher than a potential of the second electrode.   
     
     
         14 . An electronic device comprising the organic device according to  claim 8 , wherein the electronic device is one selected from the group consisting of a cellular phone, a personal computer, a monitor, a video camera, a digital camera, a goggle type display, a navigation system, audio components, a car audio system, game machine, a mobile computer, a portable game machine, an electronic book, and an image reproducing device equipped with a recording medium. 
     
     
         15 . An organic device comprising:
 a first electrode;   a second electrode opposed to the first electrode;   a third electrode between the first electrode and the second electrode;   a first light emitting layer between the first electrode and the third electrode;   a second light emitting layer between the second electrode and the third electrode;   wherein the third electrode is a single layer,   wherein a metal having a work function of 4.2 eV or less, a metal having a work function of more than 4.2 eV, and an organic compound are mixed in the third electrode, and   wherein the organic device is configured to be capable of flowing current from the first electrode to the second electrode.   
     
     
         16 . The organic device according to  claim 15 ,
 wherein the third electrode is in contact with the first light emitting layer.   
     
     
         17 . The organic device according to  claim 15 ,
 wherein the third electrode is in contact with the second light emitting layer.   
     
     
         18 . The organic device according to  claim 15 ,
 wherein the organic compound comprises a π conjugated organic compound.   
     
     
         19 . The organic device according to  claim 15 ,
 wherein the organic compound comprises a bipolar organic compound.   
     
     
         20 . The organic device according to  claim 15 ,
 wherein the third electrode is configured to inject electron to the first light emitting layer and to inject hole to the second light emitting layer when a voltage is applied to the first electrode to the second electrode so that a potential of the first electrode is higher than a potential of the second electrode.   
     
     
         21 . An electronic device comprising the organic device according to  claim 15 , wherein the electronic device is one selected from the group consisting of a cellular phone, a personal computer, a monitor, a video camera, a digital camera, a goggle type display, a navigation system, audio components, a car audio system, game machine, a mobile computer, a portable game machine, an electronic book, and an image reproducing device equipped with a recording medium.